Hoisting mechanism



Dec. 31, 1929. w. s. HOFSTRA 1,742,142

HOISTING MECHANISM Filed May :51, 1924 Patented Dec. 31, 1929 'rr arewIEBn s. noFsrnA, or cLAnn'i/ionnnnw nnnirsninn, ASSIGNOR TO SULLIVANMA- onmnnv COMPANY, A CORPGRATION or nessecnusnrrs HOISTING MECHANISMApplication filed May 31,

This invention relates to hoisting mechanisms.

It has for its object to provide an improved hoisting mechanism. Inhoisting mechanisms of the portable type herein shown, it is highlydesirable to provide suitable means for removably supporting thestationary casing of the drum driving motor in such a manner peripheryof the motor casing in such a man ner that the space occupied by thewhole mechanism will be exceeding small. Another object is to provideimproved supporting means for the motor casing such as will surround andclamp the same.

In the accompanying drawings I have shown for purposes of illustrationone form which my invention may assumein practice.

In these drawings,-

Fig. 1 is a side elevation.

1 Fig.2 is a detailed fragmentary view of a part of the clamp.

Fig. 3 is a detailed view in side elevation, the drums and clamp beingshown in section.

In the illustrative embodiment of my invention I have shown a doubledrum hoist, although it will be obvious that my improvement isapplicable to a single drum hoist wherein the end of the motor may befreely accessible. More specifically, the hoist comprises a base 1having at the ends thereof standards 2 and 3. A central standard 4 iscarried by the base intermediate the adjacent ends of drums 5. Thelatter are journaled respectively in the standards 2 and 3 at theirremote ends, their adjacent ends being journaled upon the motor casing 6carried by the central standard 4. The details of the drums and drivingconnections between the motor and the drums will not be fully describedin view of the fact that they are of a well-known type. It will sufficeto say that the driving connections for the drums are controlled 1924.Serial No. 716,869.

through frictionally controlled members 7 and 8; and when it is desiredto drive the drums, the members 7 and 8 are held stationary by frictionmeans such as a brake, where as when it is not desired to drive thedrums the members 7 and 8 are released from the friction means andallowed to rotate.

The particular way of supporting the motor casing which I have shown asillustrating my invention consists in making the central standard a inthe nature of a clamp split as at 8, lugs 9 and 10 being formed on theclamp adj acontthe split and being adapted to be drawn together as by abolt 11. l/Vhen the bolt 11 is loosened, the motor casing may beinserted in the clamp, after which the casing may be clamped in positionby tighteningthe bolt 11. It is to be noted that the split of the clampis to one side of the vertical center line to enable a suitable eye bolt12 to be disposed 011 the upper portion thereof for use in raising orlowering the hoist to its op erating position.

in the assembling of the device the motor will be inserted and clampedwithin the central standard, after which the end standards 2 and 3 andthe drums 5, Swill be placed upon the base, it being understood thateach end standard and its respective drum is a unit adapted to beassembled with the motor casing and base without necessitating removalof the motor casing or disturbing the clamping standard which in thepreferred embodiment herein disclosed is made integral with the base 1.It will of course be understood that the motor embodied herein may be ofthe electric type having a central drive shaft or of the air typewherein a plurality of intermeshing rotors may be used.

While I have in this application specifically described one form whichmy invention may assume in practice, it will be understood that thisform of the same is shown for purposes of illustration and that theinvention may be modified and embodied in various other forms withoutdeparting from its spirit or the scope of the appended claims.

What I claim as new and desire to secure by Letters Patent is:

1. In a hoist, a plurality of supporting members comprising a standardso formed as to provide a Journal and a standard so formed as to provideseparable branches constituting a split clamp, a base carrying saidplurality of supporting members, a motor casing held Within said clamp,and a drum rotatabl-y supported on said casing and said journal.

2. In a hoisting mechanism, a base, a stand ard positioned thereoncomprising a split annular clamp, a motor casing held within said clamp,drums having their inner ends rotatably supported on said casing one ateach side of said clamp, and standards carried by said base androtatably supporting the remote ends of said drums.

3. In a hoisting mechanism, a base, a standard carried by said base andformed at its upper portion as two separable curved branches, connectingmeans therefor, one of said branches extending beyond the vertical axialplane of the standard so as to form a split clamp with the connect-ionoff-set from said vertical axial plane, means on the clamp at said axialline suitable for attachment of transporting mechanism, and a motorcasing removably held: within said branches and clamped thereby to saidbase.

4:. In a hoisting mechanism, the combination with a driving motor havinga casing and a winding drum having one end surrounding and journaled onsaid motorcasing, of a base, a standard carried by said base and formedat its upper portion as two separable curved branches, one extendingbeyond: the vertical axial plane oi the stand ard so as to form a split,clamp with the separation between its parts ofliset from said verticalaxial plane, the casing of the motor being removably held within saidbranches and clamped thereby to. said base, and a second standardcarried by said base and rotatably supporting the other end of the drum.

Intestimony whereof I afiix my signature.

WVIEBE S. HOFSTRA.

